SETREUID(2)               386BSD Programmer's Manual               SETREUID(2)

NAME
     setreuid - set real and effective user ID's

SYNOPSIS
     #include <unistd.h>

     int
     setreuid(int ruid, int euid)

DESCRIPTION
     The real and effective user ID's of the current process are set according
     to the arguments.  If ruid or euid is -1, the current uid is filled in by
     the system.  Unprivileged users may change the real user ID to the
     effective user ID and vice-versa; only the super-user may make other
     changes.

RETURN VALUES
     Upon successful completion, a value of 0 is returned.  Otherwise, a value
     of -1 is returned and errno is set to indicate the error.

ERRORS
     [EPERM]  The current process is not the super-user and a change other
              than changing the effective user-id to the real user-id was
              specified.

SEE ALSO
     getuid(2),  setregid(2),  setuid(3)

HISTORY
     The setreuid function call appeared in 4.2BSD.

4th Berkeley Distribution       March 10, 1991                               1